/* ===== CSS Variables ===== */
:root {
  /* Light theme */
  --color-bg: #f5f5f5;
  --color-text: #1a1a2e;
  --color-accent: #e94560;
  --color-secondary: #16213e;
  --color-card: #ffffff;
  --color-header-bg: #ffffff;
  --color-footer-bg: #16213e;
  --color-footer-text: #e0e0e0;
  --color-border: #e0e0e0;
  --color-nav-link: #1a1a2e;
  --color-nav-active: #e94560;

  /* Typography */
  --font-main: 'Segoe UI', 'Roboto', Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 20px;
  --font-size-xl: 28px;
  --font-size-xxl: 40px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 60px;

  /* Layout */
  --container-max: 1200px;
  --header-height: 70px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Dark theme */
[data-theme="dark"] {
  --color-bg: #0f0f23;
  --color-text: #e0e0e0;
  --color-accent: #ff6b6b;
  --color-secondary: #1a1a3e;
  --color-card: #1e1e3a;
  --color-header-bg: #1a1a3e;
  --color-footer-bg: #0a0a1a;
  --color-footer-text: #b0b0b0;
  --color-border: #2a2a4e;
  --color-nav-link: #e0e0e0;
  --color-nav-active: #ff6b6b;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
  opacity: 0.85;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-header-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  height: var(--header-height);
  transition: background-color var(--transition-normal);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ===== Logo ===== */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-accent);
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-decoration: none;
}

.logo:hover {
  opacity: 1;
  color: var(--color-accent);
}

.logo__icon {
  font-size: 28px;
}

.logo--footer .logo__text {
  color: var(--color-accent);
}

/* ===== Navigation ===== */
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav__link {
  color: var(--color-nav-link);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 6px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-normal);
}

.nav__link:hover {
  color: var(--color-accent);
  background-color: rgba(233, 69, 96, 0.08);
}

.nav__link:hover::after {
  width: 60%;
}

.nav__link--active {
  color: var(--color-accent);
}

.nav__link--active::after {
  width: 60%;
}

/* ===== Burger Menu ===== */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  padding: 4px;
  border-radius: 6px;
  transition: background-color var(--transition-fast);
}

.burger:hover {
  background-color: rgba(233, 69, 96, 0.1);
}

.burger__line {
  display: block;
  width: 24px;
  height: 3px;
  background-color: var(--color-nav-link);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Burger active state */
.burger--active .burger__line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.burger--active .burger__line:nth-child(2) {
  opacity: 0;
}

.burger--active .burger__line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== Footer ===== */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--spacing-xl) 0;
  margin-top: auto;
  transition: background-color var(--transition-normal);
}

.footer__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer__desc {
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-sm);
}

.footer__nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__nav-list a {
  color: var(--color-footer-text);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__nav-list a:hover {
  color: var(--color-accent);
}

/* ===== Sections ===== */
.section {
  padding: var(--spacing-xxl) 0;
}

.section__title {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-normal);
}

.section__desc {
  text-align: center;
  color: var(--color-text);
  opacity: 0.7;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-lg);
  transition: color var(--transition-normal);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--color-secondary), #0f3460);
  color: #ffffff;
  padding: 100px 0;
  text-align: center;
}

.hero__title {
  font-size: var(--font-size-xxl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero__accent {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  opacity: 0.9;
  line-height: 1.6;
}

.hero__btn {
  display: inline-block;
}

/* ===== Games Grid ===== */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* ===== Game Card ===== */
.game-card {
  background-color: var(--color-card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.game-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.game-card__image {
  height: 180px;
  overflow: hidden;
  background-color: var(--color-secondary);
}

.game-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.game-card__body {
  padding: var(--spacing-md);
}

.game-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.game-card__genre {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.game-card__info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.game-card__year {
  color: var(--color-text);
  opacity: 0.6;
}

.game-card__rating {
  color: #f59e0b;
  font-weight: 600;
}

.game-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  opacity: 0.7;
  line-height: 1.5;
}

/* ===== News Grid ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

/* ===== News Card ===== */
.news-card {
  background-color: var(--color-card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.news-card__image {
  height: 200px;
  overflow: hidden;
  background-color: var(--color-secondary);
}

.news-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card__body {
  padding: var(--spacing-md);
}

.news-card__date {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  opacity: 0.5;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.news-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.news-card__summary {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  opacity: 0.7;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.news-card__link {
  color: var(--color-accent);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

/* ===== Genres ===== */
.genres__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.genres__item {
  text-align: center;
}

.genres__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background-color: var(--color-card);
  border-radius: 12px;
  color: var(--color-text);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.genres__link:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  color: var(--color-accent);
  background-color: var(--color-card);
}

.genres__icon {
  font-size: 36px;
}

.genres__name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: 8px;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 1;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn--primary:hover {
  background-color: #d63850;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
  color: #ffffff;
}

.btn--lg {
  padding: 14px 36px;
  font-size: var(--font-size-lg);
}

/* ===== Visually Hidden ===== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  border: 0;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-card);
  border: 2px solid var(--color-border);
  color: var(--color-text);
  font-size: 18px;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  margin-left: var(--spacing-md);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  transform: rotate(15deg);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Reveal animation for scroll */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--left {
  transform: translateX(-30px);
}

.reveal--left.reveal--visible {
  transform: translateX(0);
}

.reveal--right {
  transform: translateX(30px);
}

.reveal--right.reveal--visible {
  transform: translateX(0);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* ===== Responsive: Tablet ===== */
@media (min-width: 768px) and (max-width: 1023px) {
  .hero__title {
    font-size: 32px;
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }

  .section__title {
    font-size: var(--font-size-xl);
  }

  .games-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .news-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .genres__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__container {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .footer__nav-list {
    justify-content: center;
  }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 767px) {
  :root {
    --font-size-base: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --spacing-xxl: 40px;
  }

  .header__container {
    position: relative;
  }

  .burger {
    display: flex;
  }

  .theme-toggle {
    margin-left: auto;
    margin-right: var(--spacing-sm);
  }

  .nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-header-bg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md) 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 999;
  }

  .nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
  }

  .nav__item {
    width: 100%;
  }

  .nav__link {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
    font-size: var(--font-size-base);
  }

  .nav__link::after {
    display: none;
  }

  .hero {
    padding: 60px 0;
  }

  .hero__title {
    font-size: 28px;
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .games-grid {
    grid-template-columns: 1fr;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .genres__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__container {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .footer__nav-list {
    justify-content: center;
    flex-wrap: wrap;
  }
}